ARM: SAMSUNG: Constify platform_device_id

The platform_device_id is not modified by the driver and core
uses it as const.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c
index 38444b9..efa6e85 100644
--- a/arch/arm/plat-samsung/adc.c
+++ b/arch/arm/plat-samsung/adc.c
@@ -475,7 +475,7 @@
 #define s3c_adc_resume NULL
 #endif
 
-static struct platform_device_id s3c_adc_driver_ids[] = {
+static const struct platform_device_id s3c_adc_driver_ids[] = {
 	{
 		.name           = "s3c24xx-adc",
 		.driver_data    = TYPE_ADCV1,